Download Mitsubishi Electric PKFY-P30NKMU-E Service manual
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS May 2009 No. OCH462 TECHNICAL & SERVICE MANUAL R410A R22 Indoor unit [Model names] [Service Ref.] PKFY-P24NKMU-E PKFY-P30NKMU-E PKFY-P24NKMU-E.TH PKFY-P30NKMU-E.TH Note: • This manual describes only service data of the indoor units. • RoHS compliant products have <G> mark on the spec name plate. CONTENTS INDOOR UNIT 1. PART NAMES AND FUNCTIONS .......... 2 2. SPECIFICATION ..................................... 4 3. OUTLINES AND DIMENSIONS .............. 6 4. WIRING DIAGRAM ................................. 7 5. REFRIGERANT SYSTEM DIAGRAM.......... 8 6. MICROPROCESSOR CONTROL ........... 9 7. TROUBLESHOOTING .......................... 14 8. DISASSEMBLY PROCEDURE ............. 21 PARTS CATALOG (OCB462) 1 PART NAMES AND FUNCTIONS Front grille Indoor unit Filter Air inlet Emergency operation switch Air outlet Vane Louver Wireless remote controller CHECK TEST RUN display CHECK and TEST RUN display indicate that the unit is being checked or test-run. MODEL SELECT display display Lights up while the signal is transmitted to the indoor unit when the button is pressed. display Blinks when model is selected. SET TEMP. display indicates the set desired temperature. CLOCK display display Displays the current time. OPERATION MODE display Operation mode display indicates which operation mode is in effect. TIMER display CHECK TEST RUN MODEL SELECT °F °C AMPM Displays when in timer operation or when setting timer. “ AMPM NOT AVAILABLE display The vertical direction of air flow is indicated. ON/OFF “ TEMP ”“ ” display Displays the order of timer operation. ”“ ” display Displays whether timer is on or off. display button FAN SPEED display indicates which fan speed has been selected. FAN AUTO STOP VANE AUTO START SET TEMPERATURE button sets any desired room temperature. ON/OFF button The unit is turned ON and OFF alternately each time the button is pressed. MODE TIMER CONTROL buttons CHECK LOUVER h FAN SPEED SELECT button Used to change the fan speed. MODE SELECT button TEST RUN SET min RESET AUTO STOP (OFF timer): when this switch is set, the air conditioner will be automatically stopped at the preset time. AUTO START (ON timer): when this switch is set, the air conditioner will be automatically started at the preset time. CLOCK Used to switch the operation mode between cooling, drying, fan, heating and auto mode. h and min buttons Buttons used to set the “hour and minute” of the current time and timer settings. + In case the outdoor unit is cool only type, the heating and auto mode are not available. LOUVER button Changes left/right airflow direction. CHECK-TEST RUN button (Not available for this model.) Only press this button to perform an inspection check or test operation. Do not use it for normal operation. CLOCK button RESET button VANE CONTROL button SET button Used to change the air flow 2 Wired remote controller Display Section For purposes of this explanation, all parts of the display are shown as lit. During actual operation, only the relevant items will be lit. Day-of-Week “Sensor” indication Shows the current day of the week. Displayed when the remote controller sensor is used. Time/Timer Display Shows the current time, unless the simple or Auto Off timer is set. If the simple or Auto Off timer is set, the time to be switched off is shown. “Locked” indicator Indicates that remote controller buttons have been locked. Identifies the current operation “Clean The Filter” indicator Shows the operating mode, etc. *Multilanguage display is available. To be displayed on when it is time to clean the filter. TIME SUN MON TUE WED THU FRI SAT TIMER Hr ON AFTER Indicates that operation from the remote controller has been prohibited by a master controller. FUNCTION FILTER °F°C °F°C “Centrally Controlled” indicator Timer indicators AFTER OFF ERROR CODE The indicator comes on if the corresponding timer is set. WEEKLY SIMPLE AUTO OFF ONLY1Hr. Fan Speed indicator Shows the selected fan speed. “Timer is Off” indicator Indicates that the timer is off. Up/Down Air Direction indicator The indicator shows the direction of the outcoming airflow. Room Temperature display Shows the room temperature. The room temperature display range is 46–102°F. The display blinks if the temperature is less than 46°F or 102°F or more. Ventilation indicator Appears when the unit is running in Ventilation mode. “One Hour Only” indicator Temperature Setting Shows the target temperature. Displayed if the airflow is set to Low or downward during COOL or DRY mode. (Operation varies according to model.) The indicator goes off in one hour, at which time the airflow direction also changes. Louver display Indicates the action of the swing louver. Does not appear if the louver is not running. (Power On indicator) Indicates that the power is on. Operation Section ON/OFF button Temperature setting buttons Down Fan Speed button Up Timer Menu button (Monitor/Set button) Filter button (<Enter> button) Mode button (Return button) TEMP. ON/OFF Set Time buttons Check button (Clear button) Back Ahead Timer On/Off button (Set Day button) Test Run button MENU BACK PAR-21MAA MONITOR/SET ON/OFF FILTER DAY CLOCK CHECK TEST OPERATION Airflow Up/Down button CLEAR Louver button ( Operation button) To return operation number Opening the lid Built-in temperature sensor Ventilation button ( Operation button) To go to next operation number Note: ● “PLEASE WAIT” message This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure. ● “NOT AVAILABLE” message This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have). If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as far as any of the indoor units is equipped with the function. 3 2 SPECIFICATION 2-1. Specifications PKFY-P30NKMU-E PKFY-P24NKMU-E Model 1-phase 208-230V 60Hz Power source Cooling capacity (Nominal) *1 *1 Power input Current input Heating capacity (Nominal ) *2 *2 Power input Current input External finish External dimension H × W × D Net weight Heat exchanger Fan kW Btu/h kW A kW Btu/h kW A 7.0 24,000 0.04 0.29 7.9 27,000 0.04 0.29 8.8 30,000 0.06 0.43 10.0 34,000 0.06 0.43 Plastic, MUNSELL (1.0Y 9.2/0.2) 365 × 1170 × 295 14-3/8" × 46-1/16" × 11-5/8" 21 (46) Cross fin (Aluminum fin and copper tube) mm in. kg (lb) Line flow fan × 1 0 0 DC motor Type × Quantity External static press. Pa mmH2O Motor type Motor output kW 0.056 Direct-drive Driving mechanism Airflow rate (Low-High) m3/min L/s cfm dB <A> Noise level (Low-High) (measured in anechoic room) Insulation material Air filter Protection device Refrigerant control device Connectable outdoor unit Diameter of (R410A) mm (in.) Liquid refrigerant pipe (R22) Gas 20 - 24 333 - 400 710 - 850 16 - 20 267 - 333 570 - 710 43 - 49 39 - 45 Polyethylene sheet PP honeycomb Fuse LEV R410A, R22 CITY MULTI ø9.52 (ø3/8") ø9.52 (ø3/8") ø15.88 (ø5/8") ø15.88 (ø5/8") (R410A) mm (in.) (R22) mm (in.) Flare Flare Flare Flare Field drain pipe size Standard Document attachment Accessory Optional parts External heater adapter Remarks Installation Note : Indoor : Outdoor : Pipe length : Level difference : *1 Nominal cooling conditions ø9.52 (ø3/8") ø9.52 (ø3/8") ø15.88 (ø5/8") ø15.88 (ø5/8") Flare Flare Flare Flare I.D. 16mm (5/8") Installation Manual, Instruction Book PAC-YU25HT Details on foundation work, insulation work, electrical wiring, power source switch, and other items shall be referred to the Installation Manual. Unit converter *2 Nominal heating conditions 80°FDB/67°FWB (26.7°CDB/19.4°CWB) 95°FDB (35°CDB) 25 ft. (7.6 m) 0 ft (0 m) 70°FDB(21°CDB) 47°FDB/43°FWB (8.3°CDB/6.1°CWB) 25 ft. (7.6 m) 0 ft (0 m) * Due to continuing improvement, above specification may be subject to change without notice. 4 kcal/h Btu/h cfm lb = kW × 860 = kW × 3,412 = m3/min × 35.31 = kg/0.4536 *Above specification data is subject to rounding variation. 2-2. Electrical parts specifications Service Ref. PKFY-P24NKMU-E.TH Symbol PKFY-P30NKMU-E.TH Parts name Room temperature thermistor TH21 Resistance 30°F/15.8k, 50°F/9.6k, 70°F/6.0k, 80°F/4.8k, 90°F/3.9k, 100°F/3.2k Liquid pipe thermistor TH22 Resistance 30°F/15.8k, 50°F/9.6k, 70°F/6.0k, 80°F/4.8k, 90°F/3.9k, 100°F/3.2k Gas pipe thermistor TH23 TH24 Resistance 30°F/15.8k, 50°F/9.6k, 70°F/6.0k, 80°F/4.8k, 90°F/3.9k, 100°F/3.2k Fuse (Indoor controller board) FUSE 250V 3.15A Fan motor MF 8-Pole Output 56W / RCOJ56-AC Vane motor (with limit switch) MV MSBPC20 DC12V Linear expansion valve LEV Power supply terminal block TB2 (L1, L2, GR) 250V 20A TB5 (M1, M2, S) 250V 20A TB15 (1, 2) 250V 10A Transmission terminal block MA remote controller terminal block EFM-40YGME DC 12 V EFM-80YGME DC 12 V 2-3. Sound levels Sound level at anechoic room : Low-High Sound level dB (A) Service Ref. 39 - 45 PKFY-P30NKMU-E.TH 43 - 49 3.3 ft. (1m) PKFY-P24NKMU-E.TH 3.3 ft. (1m) Measurement location * Measured in anechoic room. 2-4. NC curves PKFY-P30NKMU-E External static pressure : 0Pa Power source : 208,230V, 60Hz 70.0 High speed Low speed 65.0 60.0 NC60 55.0 50.0 NC50 45.0 40.0 NC40 35.0 30.0 NC30 25.0 20.0 Approximate minimum audible limit on continuous noise NC20 15.0 10.0 63 125 250 500 1k 2k 4k OCTAVE BAND CENTER FREQUENCIES(Hz) 8k OCTAVE BAND PRESSURE LEVEL (dB) 0dB = 20MPa OCTAVE BAND PRESSURE LEVEL (dB) 0dB = 20MPa PKFY-P24NKMU-E External static pressure : 0Pa Power source : 208,230V, 60Hz 70.0 High speed Low speed 65.0 60.0 NC60 55.0 50.0 NC50 45.0 40.0 NC40 35.0 30.0 NC30 25.0 20.0 Approximate minimum audible limit on continuous noise NC20 15.0 10.0 63 125 250 500 1k 2k 4k OCTAVE BAND CENTER FREQUENCIES(Hz) 5 8k OUTLINES AND DIMENSIONS PKFY-P24NKMU-E.TH PKFY-P30NKMU-E.TH Unit : inch (mm) 5-17/132(140.3) 2-9/16(65.2) Top side 17(431.7) 7/16(11) 16-11/16(423.7) Left side Right side Front side 14-3/8(365) Mount board Knock out hole for left piping C 2-29/32(74) 9-1/2(241) 33-21/32(855) 46-1/16(1170) A 3/16(5) 11-5/8(295) Operation lamp Front side(Grille open) Knock out hole for right piping DEFROST/STAND BY lamp Receiver 2-3/32(53) 1-1/4(32) 23/32(18) Terminal block for power supply Terminal block for transmission Terminal block for MA-remote controller Emergency operation switch (cooling/heating) Filter hook 1-3/16(30) 1-3/8(35) 17-15/32(444)Gas pipe 2-19/32(66) 4-27/32(123) 18-31/32(482)Liquid pipe 23-1/32(585)Drain hose 6-1/16(154) 5-9/32(134) Under side Piping connection Vane(auto) Louver(manual) B Liquid pipe B Knock out hole for lower piping Sleeve (purchased locally) :2-15/16 (:75) Through hole Gas pipe :2-15/16~:3-5/32 (:75~:80) Drain hose Refrigerant pipe: 3/8 O.D(:9.52) Flared connection: 3/8F Refrigerant pipe: 5/8 O.D(:15.88) Flared connection: 5/8F 5/8(:16) O.D Required space(Indoor unit) 2-9/16(65) B 3-1/32(77) 3-7/16(87) 2-9/16(65) 13/32(10.7) 1/8(3) 2-1/8(54) 0 Center measurement hole :3/32(:2.5) 5/8(15.5) 14-11/32(364) 15-1/8(384.5) 16-3/32(408.5) 17-9/32(439) 17-7/8(454) 18-5/16(465.5) Mount board 12-3/8(314) 4-11/32(110) 2-3/8(60) 13/32(10) 0 13/32(10) 2-3/8(60) 4-11/32(110) 12-3/8(314) 17-7/8(454) 17-9/32(439) 16-3/32(408.5) 15-1/8(384) 14-11/32(364) 20-3/8(517.4) 4-:11/32(:9) Bolt hole 75-:3/16(:5.1) Tapping screw hole Indoor unit outline 2-1/8(54) 1-1/4(32) 31/32(25) 1/2(12.5) 0 1/2(12.5) 1-15/32(37.5) 2-15/32(62.5) 3-7/16(87.5) 4-1/8(104.5) 5-3/32(129.5) 0 31/32(25) 1-31/32(50) 2-15/16(75) 3-15/16(100) 4-19/32(117) 4-29/32(125) 5-19/32(142) 7-9/16(192) 9-17/32(242) 6-9/16(167) 8-17/32(217) 9-1/32(229.5) 10-13/32(264) 11-1/2(292) 11(279.5) 11-1/2(292) Wall hole for right rear piping 6 23-1/32(585) 17-11/16(449.2) 13-11/32(339) 13-3/4(349.2) 15-1/8(384) 8-17/32(216.5) 0 15-1/8(384) 13-11/32(339) 7-7/16(189) Knock out hole for rear piping 2-15/16×18-29/32(75×480) 37.5) /32(R R1-15 16-15/16(430.5) 12-5/32(308.5) 12-1/4(311) Wall hole for left rear piping A 5/16(7.8) 5/16(7.8) 2-5/8(67) 3-1/32(77) Min.1-7/8(48) C Min.9-27/32(250) Min.2(50.5) Min.8-21/32(220) Min.2-27/32(72.4) 23-1/32(585) Min.9/32(7) Air outlet 3-1/32(77) 2-5/8(67) Knock out hole for piping Air inlet 20-7/8(530.5) 3 2-9/16(65) 4 WIRING DIAGRAM PKFY-P24NKMU-E.TH SYMBOL I.B CN24 CN32 CN51 CN52 BZ DSA FUSE LED1 LED2 SW2 SW3 SW4 SWE X1 MOV 01,02 LEV MF MV TB2 TB5 TB15 PKFY-P30NKMU-E.TH SYMBOL NAME INDOOR CONTROLLER BOARD CONNECTOR EXTERNAL HEATER TH21 REMOTE SWITCH TH22 CENTRALLY CONTROL REMOTE INDICATION TH23 BUZZER SURGE ABSORBER FUSE (T3.15AL 250V) POWER SUPPLY (I.B) POWER SUPPLY (I.B) SWITCH CAPACITY CODE MODE SELECTION MODE SELECTOR DRAIN PUMP (TEST MODE) AUX.RELAY DRAIN PUMP VARISTOR LINER EXPANSION VALVE FAN MOTOR VANE MOTOR TERMINAL POWER SUPPLY BLOCK TRANSMISSION MA-REMOTE CONTROLLER TH24 A.B SWA SW1 SW11 SW12 SW14 S.B SWE1 SWE2 W.B LED1 LED2 RU NAME THERMISTOR ROOM TEMP. DETECTION (32°F/15kΩ, 77°F/5.4kΩ) PIPE TEMP. DETECTION/LIQUID (32°F/15kΩ, 77°F/5.4kΩ) PIPE TEMP. DETECTION/GAS1 (32°F/15kΩ, 77°F/5.4kΩ) PIPE TEMP. DETECTION/GAS2 (32°F/15kΩ, 77°F/5.4kΩ) ADDRESS BOARD FAN SPEED SELECTOR SWITCH MODE SELECTION ADDRESS SETTING 1s DIGIT ADDRESS SETTING 10ths DIGIT BRANCH No. For the detail, refer to Fig. 1. SWITCH BOARD EMERGENCY OPERATION (HEAT) EMERGENCY OPERATION (COOL) PCB FOR WIRELESS REMOTE CONTROLLER LED (OPERATION INDICATION: GREEN) LED (OPERATION INDICATION: ORANGE) RECEIVING UNIT <Fig. 1> See Fig. 1. 7 5 REFRIGERANT SYSTEM DIAGRAM PKFY-P24NKMU-E.TH PKFY-P30NKMU-E.TH Gas pipe thermistor (1) TH23 Strainer (#50mesh) Gas pipe Gas pipe thermistor (2) TH24 Flare connection Liquid pipe thermistor TH22 Heat exchanger Liquid pipe Linear expansion valve Strainer1 (#50mesh) Strainer2 (#100mesh) Strainer (#100mesh) Room temparature thermistor TH21 Unit : mm (inch) Model PKFY-P24NKMU-E PKFY-P30NKMU-E Gas pipe :15.88 (5/8) :15.88 (5/8) Liquid pipe :9.52 (3/8) :9.52 (3/8) Item 8 6 MICROPROCESSOR CONTROL INDOOR UNIT CONTROL 6-1. COOL OPERATION <How to operate> Press POWER ON/OFF button. Press the operation MODE button to display COOL. Press the TEMP. button to set the desired temperature. NOTE: The set temperature changes 2°F when the or pressed one time. Cooling 67 to 87°F TIME SUN MON TUE WED THU FRI SAT TIMER Hr ON AFTER AFTER OFF ERROR CODE FUNCTION FILTER ûFûC ûFûC WEEKLY SIMPLE AUTO OFF ONLY1Hr. TEMP. MENU BACK PAR-21MAA MONITOR/SET ON/OFF ON/OFF FILTER DAY CLOCK Control modes 1. Thermoregulating function button is CHECK TEST OPERATION CLEAR Control details 1-1. Thermoregulating function (Function to prevent restarting for 3 minutes) • Room temperature desired temperature + 2°F ···Thermo ON • Room temperature desired temperature ···Thermo OFF Remarks 1-2. Anti-freezing control Detected condition : When the liquid pipe temp. (TH22) is 32°F or less in 16 minutes from compressors start up, anti-freezing control starts and the thermo OFF. Released condition : The timer which prevents reactivating is set for 3 minutes, and anti-freezing control is cancelled when any one of the following conditions is satisfied. Liquid pipe temp. (TH22) turns 50°F or above. The condition of the thermo OFF has become complete by thermoregulating, etc. The operation modes became mode other than COOL. The operation stopped. 3. Vane (up/down vane change) By the remote controller setting (switch of 2 speeds) Type Fan speed notch 2 speeds [Low], [High] (1) Initial setting: Start at COOL mode and horizontal vane. (2) Vane position: Horizontal →Downward A →Downward B →Downward C→Downward D→Swing→Auto → 2. Fan (3) Restriction of the downward vane setting When setting the downward vane A, B, C or D in [Low] of the fan speed notch, the vane changes to horizontal position after 1 hour have passed. 9 · "ONLY 1 Hr" appears on the wired remote controller. 6-2. DRY OPERATION TIME SUN MON TUE WED THU FRI SAT TIMER Hr ON AFTER AFTER OFF ERROR CODE FUNCTION FILTER ûFûC ûFûC WEEKLY SIMPLE AUTO OFF ONLY1Hr. TEMP. MENU BACK PAR-21MAA MONITOR/SET ON/OFF ON/OFF CHECK TEST OPERATION CLEAR Control modes 1. Thermoregulating function Remarks Control details 1-1. Thermoregulating function (Function to prevent restarting for 3 minutes) Setting the Dry thermo by the thermoregulating signal and the room temperature (TH21). Dry thermo ON Room temperature desired temperature + 2°F Dry thermo OFF Room temperature desired temperature Room temperature Dry thermo Dry thermo ON OFF Thermoregulating signal Room temperature (T1) time (min) time (min) 3 min. passed since starting operation ON Over 64°F T1 83°F 9 3 83°F > T1 79°F 7 3 79°F > T1 75°F 5 3 3 3 3 10 75°F > T1 OFF Unconditional Dry thermo OFF Less than 64°F 1-2. Freeze prevention control No control function 2. Fan button is FILTER DAY CLOCK <How to operate> Press POWER ON/OFF button. Press the operation MODE button to display DRY. Press the TEMP. button to set the desired temperature. NOTE: The set temperature changes 2°F when the or pressed one time. Dry 67 to 87°F Indoor fan operation controlled depending on the compressor conditions. Dry thermo Fan speed notch ON [Low] OFF Excluding the following Stop Room temp. < 64°F [Low] Note: Remote controller setting is not acceptable. Same control as COOL operation 3. Vane (up/down vane change) 10 6-3. FAN OPERATION <How to operate> Press POWER ON/OFF button. Press the operation MODE button to display FAN. TIME SUN MON TUE WED THU FRI SAT TIMER Hr ON AFTER AFTER OFF ERROR CODE ûFûC ûFûC WEEKLY SIMPLE AUTO OFF ONLY1Hr. TEMP. MENU BACK PAR-21MAA MONITOR/SET FUNCTION FILTER ON/OFF ON/OFF FILTER DAY CLOCK CHECK TEST OPERATION CLEAR Control modes 1. Fan Control details Remarks Set by remote controller. Type Fan speed notch 2 speeds [Low], [High] 2. Vane Same as the control performed during the COOL operation, but with no restriction (up/down vane change) on the vane's downward blow setting 11 · Same control as COOL operation 6-4. HEAT OPERATION <How to operate> Press POWER ON/OFF button. Press the operation MODE button to display HEAT. Press the TEMP. button to set the desired temperature. NOTE: The set temperature changes 2°F when the or pressed one time. Heating 63 to 83°F. TIME SUN MON TUE WED THU FRI SAT TIMER Hr ON AFTER AFTER OFF ERROR CODE ûFûC ûFûC WEEKLY SIMPLE AUTO OFF ONLY1Hr. TEMP. MENU BACK PAR-21MAA MONITOR/SET FUNCTION FILTER ON/OFF ON/OFF <Display in HEAT operation> [DEFROST] The [DEFROST] symbol is only displayed during the defrost operation. [STANDBY] The [STANDBY] symbol is only displayed during the hot adjust mode. FILTER DAY CLOCK CHECK TEST OPERATION CLEAR Control modes 1. Thermoregulating function 2. Fan button is Remarks Control details 1-1. Thermoregulating function (Function to prevent restarting for 3 minutes) • Room temperature desired temperature -2°F ···Thermo ON • Room temperature desired temperature ···Thermo OFF By the remote controller setting (switch of 2 speeds) Type Fan speed notch 2 speeds [Low], [High] 2-1. Hot adjust mode The fan controller becomes the hot adjuster mode for the following conditions. When starting the HEAT operation When the thermoregulating function changes from OFF to ON. When release the HEAT defrosting operation Hot adjust mode *1 *1 "STAND BY" will be displayed during the hot adjust mode. Set fan speed by the remote controller [Low] [Extra Low] A B C A: Hot adjust mode starts. B: 5 minutes have passed since the condition A or the indoor liquid pipe temperature turned 95°F or more. C: 2 minutes have passed since the condition B. (Terminating the hot adjust mode) 2-2. Residual heat exclusion mode When the condition changes the auxiliary heater ON to OFF (thermoregulating or operation stop, etc), the indoor fan operates in [Low] mode for 1 minute. · This control is same for the model without auxiliary heater. To be continued on the next page. 12 From the preceding page Control details Control modes Remarks 2-3. Thermo OFF mode When the thermoregulating function changes to OFF, the indoor fan operates in [Extra low]. 2. Fan 2-4. Heat defrosting mode The indoor fan stops. (1) Initial setting: OFF → HEAT···[last setting] When the last setting is [Swing] ··· [Downward D] When changing the mode from exception of HEAT to HEAT operation ···[Downward D] (2) Vane position: 3. Vane control (Up/down vane change) → Horizontal →Downward A →Downward B →Downward C→Downward D→Swing→Auto (3) Restriction of vane position The vane is horizontally fixed for the following modes. (The control by the remote controller is temporally invalidated and control by the unit.) •Thermo OFF •Hot adjust [Extra low] mode •Heat defrost mode 6-5. AUTO OPERATION [AUTOMATIC COOL/HEAT CHANGE OVER OPERATION] TIME SUN MON TUE WED THU FRI SAT TIMER Hr ON AFTER AFTER OFF ERROR CODE ûFûC ûFûC WEEKLY SIMPLE AUTO OFF ONLY1Hr. TEMP. MENU BACK PAR-21MAA MONITOR/SET FUNCTION FILTER ON/OFF ON/OFF button is FILTER DAY CLOCK <How to operate> Press POWER ON/OFF button. Press the operation MODE button to display AUTO. Press the TEMP. button to set the desired temperature. NOTE: The set temperature changes 2°F when the or pressed one time. Automatic 67 to 83°F CHECK TEST OPERATION CLEAR Control details Control modes 1. Initial value of HEAT mode for room temperature < Desired temperature operation mode COOL mode for room temperature Desired temperature 2. Mode change (1) HEAT mode → COOL mode Room temperature Desired temperature + 3°F. or 3 min. has passed (2) COOL mode → HEAT mode Room temperature Desired temperature - 3°F. or 3 min. has passed 3. COOL mode Same control as cool operation 4. HEAT mode Same control as heat operation 13 Remarks 7 TROUBLESHOOTING 7-1. HOW TO CHECK THE PARTS PKFY-P24NKMU-E.TH PKFY-P30NKMU-E.TH Parts name Check points Disconnect the connector then measure the resistance with a tester. (At the ambient temperature 50°F~86°F) Room temperature thermistor (TH21) Liquid pipe temperature thermistor (TH22) Gas pipe temperature thermistor (TH23 ,24) Vane motor (MV) Red Normal Abnormal Open or short Orange Green 250 ± 7% Refer to 7-1-3. Linear expansion valve (LEV) CN60 White Yellow Orange Blue Red Brown Refer to 7-1-1. - - - - Brown-Red Brown-Orange Brown-Yellow Brown-Green M Fan motor (MF) LEV Abnormal Open or short Measure the resistance between the terminals with a tester. (Coil temperature 68°F) Yellow Brown Connect pin No. Normal 4.3k~9.6k Disconnect the connector then measure the resistance value with a tester. (Coil temperature 68°F) 1 2 3 4 5 6 Normal Abnormal (1)-(5) (2)-(6) (3)-(5) (4)-(6) White-Red Yellow-Brown Orange-Red Blue-Brown Open or short 200 ± 10% 7-1-1. Thermistor <Thermistor characteristic graph> < Thermistor for lower temperature > 50 Room temperature thermistor (TH21) Liquid pipe temperature thermistor (TH22) Gas pipe temperature thermistor (TH23) (TH24) Thermistor for lower temperature Rt=15exp { 3480( 30°F 50°F 70°F 80°F 90°F 100°F 15.8kΩ 9.6kΩ 6.0kΩ 4.8kΩ 3.9kΩ 3.2kΩ 1 273+(t-32)/1.8 Resistance (kΩ) Thermistor R0=15kΩ ± 3% Fixed number of B=3480 ± 2% 40 1 )} 273 30 20 10 0 -20 0 20 40 60 80 Temperature (°F) 100 120 7-1-2. Liner expansion valve Operation summary of the linear expansion valve • Linear expansion valve open/close through stepping motor after receiving the pulse signal from the indoor controller board. • Valve position can be changed in proportion to the number of pulse signals. Controller board <Connection between the indoor controller board and the linear expansion valve> DC12V Brown 6 Red 5 Blue 4 Φ4 Φ3 Orange 3 Φ3 Φ2 Yellow 2 Φ2 Φ1 White 1 Φ1 Linear expansion valve 4 M 1 White Red 5 6 2 3 Orange Blue Brown Yellow Φ4 Connector(CN60) 14 Drive circuit <Output pulse signal and the valve operation> Output Output (Phase) 1 ON ON OFF OFF [1 [2 [3 [4 2 OFF ON ON OFF 3 OFF OFF ON ON 4 ON OFF OFF ON Linear expansion valve operation Note: • When linear expansion valve operation stops, all output phase become OFF. • At phase interruption or when phase does not shift in order, motor does not rotate smoothly and motor will lock and vibrate. • When the switch is turned on, 2200 pulse closing valve signal will be sent till it goes to point in order to define the valve position. Open C D Valve position (capacity) Closing a valve : 1 → 2 → 3 → 4 → 1 Opening a valve : 4 → 3 → 2 → 1 → 4 The output pulse shifts in above order. • When the valve moves smoothly, there is no sound or vibration occurring from the linear expansion valves, however, when the pulse number moves from to or when the valve is locked, more sound can be heard than in a normal situation. • Sound can be detected by placing the ear against the screw driver handle while putting the screw driver tip to the linear expansion valve. Close Open Outdoor unit R410A model : 1400 pulse Outdoor unit R22 model : 2000 pulse Opening a valve all the way A E Close B Pulse number Extra tightening (200~800 pulse) Trouble shooting Check points Symptom Countermeasures Operation circuit failure of the micro processor Disconnect the connector on the controller board, then con- Exchange the indoor connect LED for checking. troller board at drive circuit 6 5 failure. 4 3 2 1 1kΩ LED When power is turned on, pulse signals will be output for 10 seconds. There must be some defects in the operation circuit if the LED does not light while the signals are output or keeps lighting even after the signals stop. Linear expansion valve mechanism is locked. Motor will idle and make a ticking noise when the motor is operated while the linear expansion valve is locked. This ticking sound is the sign of the abnormality. Exchange the linear expansion valve. Short or breakage Measure the resistance between each coil (white-red, yellow- Exchange the linear expanof the motor coil of brown, orange-red, blue-brown) using a tester. It is normal if sion valve. the linear expansion the resistance is in the range of 200Ω ±10%. valve Valve does not close To check the linear expansion valve, operate the indoor unit If large amount of refrigercompletely. in fan mode and at the same time operate other indoor units ant is leaked, exchange the linear expansion valve. in cooling mode, then check the pipe temperature <liquid pipe temperature> of the indoor unit by the outdoor multi controller board operation monitor. During fan operation, linear expansion valve is closed completely and if there Thermistor (Liquid pipe) is any leaking, detecting temperature of the thermistor will go lower. If the detected Linear temperature is much lower than the temexpansion valve perature indicated in the remote controller, it means the valve is not closed all the way. It is not necessary to exchange the linear expansion valve, if the leakage is small and not affecting normal operation. Wrong connection of the connector or contact failure Check the color of lead wire and missing terminal of the con- Disconnect the connector nector. at the controller board, then check the continuity. 15 7-1-3. DC Fan motor (fan motor/indoor controller circuit board) Check method of DC fan motor (fan motor/indoor controller circuit board) Notes · High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNMF) for the motor with the power supply on. (It causes trouble of the indoor controller circuit board and fan motor.) Self check Symptom : The indoor fan cannot turn around. Wiring contact check Contact of fan motor connector (CNMF) Is there contact failure? Wiring recovery Yes No Power supply check (Remove the connector (CNMF)) Measure the voltage in the indoor controller circuit board. TEST POINT : VDC (between 1 (+) and 3 (-) of the fan connector): VDC DC294~325V TEST POINT : VCC (between 4 (+) and 3 (-) of the fan connector): VCC DC15V Is the voltage normal? Indoor controller board fuse check No No Is the fuse normal? Replace the fuse Yes OK Check the operation Yes Sensor signal check Measure the voltage between CNMF and DC 0V and DC 15V in the indoor controller circuit board. No Does the voltage repeat DC 0V and DC 15V? NG Replace indoor controller board. OK Check the operation END NG Replace the fan motor Yes Replace indoor controller board Replace the fan motor OK OK Check the operation END Check the operation NG NG Replace the fan motor. Replace indoor controller board. 16 END END 7-2. Function of Dip switch PKFY-P24NKMU-E.TH PKFY-P30NKMU-E.TH Switch Pole Operation by switch Function ON OFF 1 Thermistor<Room temperature> position Built-in remote controller Indoor unit 2 Filter clogging detection Provide Not provide 3 Filter cleaning sign 4 Fresh air intake SW1 5 Mode selection 6 7 Remarks Address board <Initial setting> ON OFF 2,500 hr 100 hr Not effective Not effective 1 2 3 4 5 6 7 8 9 10 +2 Switching remote controller display Thermo ON signal indication Fan output indication Fan operation at Heating mode Thermo ON operation at heating mode Humidifier control Extra low +1 8 Air flow set in case of heat Low +1 thermo OFF Setting air flow +1 9 Auto restart function Effective Not effective Power ON/OFF by breaker Effective Not effective 10 Effective timing P24 P30 Under suspension ON OFF SW1-7 SW1-8 Fan speed OFF OFF Extra low ON OFF Low OFF ON Setting air flow ON ON Stop Depends on SW1-7 +2 It is impossible to intake the fresh air. Indoor controller board SW2 Models SW2 Capacity 1~6 code switch NOTE: +1 Before power supply ON 123456 ON OFF 123456 1 Heat pump/Cool only 2 Not used — — 3 Not used — — SW3 4 Function selection 5 6 Cooling only Heat pump Vane horizontal angle Second setting +1 First setting Changing the opening of linear expansion valve during thermo OFF Effective Not effective Heating 4 degree up Not effective Effective 7 Target superheat setting +2 — — 8 Target subcool — — +2 In case of replacing the indoor controller board, make sure to set the switch to the initial setting, which is shown below. SW4 Model 1~4 selection ON OFF 1 2 3 4 17 Indoor controller board <Initial setting> Under suspension ON OFF 1 2 3 4 5 6 7 8 +1 Second setting is same as first setting. +2 Please do not use SW3-7,8 as trouble might be caused by the usage condition. Indoor controller board Before power supply ON 1 CDE AB 789 Address board <Initial setting> SW14 CDE AB F01 789 Rotary switch Before power supply ON 23 Jumper 90 1 • To operate each indoor unit by each remote controller when installed 2 indoor units or more are near, Pair No. setting is necessary. Pair No. setting is available with the 4 patterns (Setting patterns A to D). . Make setting for J41, J42 of indoor controller board and the Pair No. of wireless remote controller. • You may not set it when operating it by one remote controller. Setting for indoor unit Cut jumper wire J41, J42 on the indoor controller board according to the table below. Wireless remote controller pair number: Setting operation Under 1. Press the SET button (using a pointed implement). Check that the operation remote controller's display has stopped before continuing. or MODEL SELECT flashes, and the model No. (3 digits) appears (steadily-lit). 2. Press the MINUTE button twice. The pair number appears flashing. suspension 3. Press the temperature buttons to select the pair number to set. 4. Press the SET button (using a pointed implement). The set pair number is displayed (steadily-lit) for 3 seconds, then disappears. Setting pattern Indoor controller jumper wire Pair No. of wireless remote controller J41 J42 0 — — A Initial setting 1 — — Cut B 2 — Cut — C 3 — Cut Cut D Pair No.4-9 of wireless remote controller is setting pattern D. 18 45 6 Wireless remote controller Pair No. How to set branch numbers SW14 (Series R2 only) Match the indoor unit’s refrigerant pipe with the BC controller’s end connection number. Remain other than series R2 at "0". SW11 90 1 23 J41, J42 45 6 SW14 Branch No. Setting 23 F01 SW12 23 SW14 <Initial setting> 78 45 6 45 6 10 Address board How to set addresses Example : If address is "3", remain SW12 (for over 10) at "0", and match SW11 (for 1 to 9) with "3". 78 78 78 23 Rotary Switch 90 1 45 6 SW11 90 1 Remarks 45 6 SW12 23 SW11 1s digit address setting SW12 10ths digit address setting Effective timing Operation by switch Switch <Initial setting> Pattern A Pair No. MODEL SELECT FAN AUTO STOP VANE AUTO START CHECK LOUVER SET h min TEST RUN SET button Temperature button TEMP ON/OFF MODE Model No. RESET CLOCK Minute button 7-3. TEST POINT DIAGRAM 7-3-1. Indoor controller board PKFY-P24NKMU-E.TH PKFY-P30NKMU-E.TH CNMF Connect to the fan motor (MF) 1-3 : DC294~325V 4-3 : DC15V 5-3 : DC0~6V 6-3 : DC0 or DC15V (Stop) DC7.5V (Operation) (12VDC pluse) FUSE 3.15A 250V CND Power supply for indoor controller board 1-3 : 208/230VAC LED1 Main power supply (Indoor unit : 208/230VAC) CN2M Connect to the terminal block (TB5) (M-NET transmission connecting wire) 24-30VDC (non-polar) Power supply from outdoor unit CN151 Vane motor output 12VDC pluse CNRU Connect to the wireless remote controller board (W.B) SW2 Capacity setting LDSWE(A) Connect to the wireless remote controller board (S.B) SW4 Model selection SW3 Function setting CN52 Remote indicator Jumper wire J41, J42 Pair No. setting for wireless remote controller LED2 Power supply for MA-Remote controller CN3A Connected to the termial block (TB15) (MA-Remote controller connecting wire) 1 - 3 : 8.7-13V DC (Pin1 (+)) CN32 Remote switch CN2G Pipe temperature thermistor Gas2 (TH24) CN20 Room temperature thermistor (TH21) CN44 Pipe temperature thermistor 1-2 : Liquid (TH22) 3-4 : Gas1 (TH23) 19 CN60 Liner expansion valve (LEV) output 12VDC pluse output CN24 External heater CN51 Centrally controlled LD SWE (B) Connect to the indoor controller board (I.B) 7-3-2. Wireless remote controller board PKFY-P24NKMU-E.TH PKFY-P30NKMU-E.TH LD101 Connect to the indoor controller board (I.B) 7-3-3. Address board PKFY-P24NKMU-E.TH PKFY-P30NKMU-E.TH SW1 Function setting 1 2 3 4 5 6 7 8 9 10 BCD 78 4 56 78 789A 4 56 SW12 SW11 Address setting 10ths DIGIT Address setting 1s DIGIT 3456 EF0 12 90 1 23 23 90 1 SW14 Branch No. 20 8 DISASSEMBLY PROCEDURE PKFY-P24NKMU-E.TH PKFY-P30NKMU-E.TH Be careful when removing heavy parts. OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 1. REMOVING THE PANEL Photo 1 Front grille Screws (1) Press and unlock the knobs on both sides of the front grille and lift the front grille until it is level. Pull the hinges forward to remove the front grille. (See Photo 1) (2) Remove 3 screw caps of the panel. Remove 5 screws. (See Photo 1) (3) Unfix 3 hooks. (See Figure 1) (4) Hold the lower part of both ends of the panel and pull it slightly toward you, and then remove the panel by pushing it upward. (5) Remove the screw of the corner box. (See Photo 1) Remove the corner box. Screws and screw caps Figure 1 2. REMOVING THE ADDRESS BOARD, THE INDOOR CONTROLLER BOARD, THE WIRELESS CONTROLLER BOARD Hooks Photo 2 Hook Screw of address board case (1) Remove the panel and the corner box. (Refer to 1.) (2) Remove the screw and hook of address board case. (See Photo 2) (3) Disconnect the connectors of address board. (4) Remove the front and side electrical box covers (each 1 screw). (5) Disconnect the connectors on the indoor controller board. (See Photo 3) (6) Remove the switch board holder and open the cover. (7) Pull out the indoor controller board toward you then remove the indoor controller board and switch board. (See Photo 3) (8) Remove the holder of wireless remote controller board. (9) Disconnect the connector of wireless remote controller board and remove the wireless remote controller board from the holder. Screw of the corner box Screw of electrical box cover (side) Switch board holder Water Cut Screw of electrical box cover Holder of wireless remote controller board (Front) Photo 3 Electrical box cover (Front) Indoor controller board Terminal block (TB2) Terminal block (TB5) Terminal block (TB15) Room temp. thermistor (TH21) 21 OPERATION PROCEDURE PHOTOS 3. REMOVING THE ELECTRICAL BOX Photo 4 Connect for ground (1) Remove the panel and the corner box. (Refer to 1.) (2) Remove the screw and hook of address board case. (3) Remove the front and side electrical box covers (each 1 screw). (4) Remove the transmission wiring of TB5, the power supply wiring of TB2 and the wiring of MA-remote controller (TB15). (5) Disconnect the connectors on the indoor controller board. (6) Disconnect the connector for ground wire. (7) Remove the screw on lower side of the electrical box. (See Photo 5) (8) Push up the upper fixture catch to remove the box, then remove it from the box fixture. Fixture Electrical box 4. REMOVING THE NOZZLE ASSEMBLY (with VANE and VANE MOTOR) AND DRAIN HOSE Photo 5 (see the bottom) Vane motor (1) Remove the panel and corner box. (Refer to 1.) (2) Remove the electrical box covers. (Refer to 2.) (3) Disconnect the vane motor connector (CN151) on the indoor controller board. (4) Pull out the drain hose from the nozzle assembly, and remove nozzle assembly. (See Photo 5) Nozzle assembly Drain hose Screw of electrical box Photo 6 5. REMOVING THE VANE MOTOR (1) Remove the nozzle assembly. (Refer to 4.) (2) Remove 2 screws of the vane motor unit cover, and pull out the vane motor unit. (3) Remove 2 screws of the vane motor unit. (4) Remove the vane motor from the vane motor unit. (5) Disconnect the connector from the vane motor. Screws of the vane motor unit cover 22 Screws of the vane motor unit OPERATION PROCEDURE PHOTOS 6. REMOVING THE INDOOR FAN MOTOR AND THE LINE FLOW FAN Photo 7 Screw of the motor band (1) Remove the panel and the corner box. (Refer to 1.) (2) Remove the electrical box (Refer to 2.) and the nozzle assembly (Refer to 3.). (3) Remove the water cut. (See Photo 2) (4) Remove the screw fixing the line flow fan. (See Photo 8) (5) Remove 5 screws fixing the motor bed. (See Photo 7) (6) Remove the lead wire of pipe thermistor from the hook of motor bed. (See Photo 7) (7) Remove the screw fixing motor band. (See Photo 7) (8) Remove the motor bed together with fan motor and motor band. (9) Remove 3 screws fixing the left side of the heat exchanger. (See Photo 9) (10) Lift the heat exchanger, and pull out the line flow fan to the lower-left. Lead wire of pipe thermistor Screws of the motor bed Photo 9 Screw of the line flow fan Photo 8 Screws of the left side of the heat exchanger 7. REMOVING THE LIQUID PIPE THERMISTOR AND GAS PIPE THERMISTOR (1) (2) (3) (4) (5) Remove the panel and the corner box. (Refer to 1) Remove the electrical box covers. (Refer to 2.) Remove the water cut. (See Photo 2) Remove the liquid pipe thermistor and gas pipe thermistors. Disconnect the connector (CN44) (CN2G) on the indoor controller board. (TH22 and TH23/CN44, TH24/CN2G) Photo 10 Gas pipe thermistor (TH23) (TH24) LEV Connect for ground Liquid pipe thermistor (TH22) 23 OPERATION PROCEDURE 8. REMOVING THE HEAT EXCHANGER AND LEV (1) Remove the panel and the corner box. (Refer to 1.) (2) Remove the electrical box (Refer to 3.) and the nozzle assembly (Refer to 4.). (3) Remove the water cut. (4) Remove the pipe thermistors (Refer to 7.). (5) Disconnect the connector (CN60) on the indoor controller board and the connector for ground wire. (6) Remove 3 screws fixing the left side of the heat exchanger. (See Photo 9) (7) Remove the heat exchanger with LEV. PHOTOS Photo 11 Heat exchanger LEV Water Cut Photo 12 Heat exchanger 9. REMOVING THE ROOM TEMPERATURE THERMISTOR (1) (2) (3) (4) LEV Connect for ground Indoor controller board Photo 13 Remove the panel and corner box. (Refer to 1.) Remove the electrical box covers. Remove the room temperature thermistor. Disconnect the connector (CN20) on the indoor controller board. Room temp. thermistor (TH21) HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN Copyright 2009 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in May 2009 No. OCH462 PDF 6 Made in Japan New publication, effective May 2009 Specifications subject to change without notice